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Structure of "Should" in English Grammar

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How to Use "Should" Correctly: Forms, Rules & Examples

Should have a great significance in English Grammar, it is a modal verb that is used with the base form of the verb. We use the verb “should” when we stating what would be the right thing to do or the right state for something to be in. For instance, you should complete your work on time. 


There is another modal verb called “must.” For instance, you might do your homework on time. 


Here, the difference between the verb should and must is, while using should in a statement, we don’t put compulsion on someone to do something, which means the second person has the choice to do it or not. It is just like giving suggestions to someone or advise with politeness. However, must is a verb that is used when you are emphasising on someone to do something. It is just like a piece of string advice with compulsion or less politeness.


So, on this page, we will understand more about the structure of should and the use of should in English grammar with the help of illustrative examples.

Forms Of Should 

Following are the forms of should:

  • Affirmative

  • Negative, and 

  • Question form 

Affirmative Form Of should: Examples

The formula for Affirmative form of should - Grammar > Verbs > Modal verbs and modality > Should

  1. Should comes first in the verb phrase, i.e., after the subject and before another verb; for instance: I should go to the office now.

  2. We cannot use should with another modal verb; for example, It should probably be rainy at that time of year.

The negative form of should: Examples

  1. The should negative form is should + not = shouldn’t. Please note that we don’t use the following with should: 

  • Don’t, 

  • Doesn’t, 

  • Didn’t

There shouldn’t be a hurry for a party today.

  1. We use the full form should not in informal contents or when we want to highlight something:

Example: We should not forget our warriors who gave their lives for Independent India.


The Question Form Of Should: Examples

We can use both should and shouldn’t in question tags such as:

  • I shouldn’t have told her the fact, should I?

  • They should be coming back this Sunday, shouldn’t they?

The structure of the verb should talks in detail about the uses of should in day-to-day English conversation, so let’s understand how it should be used:

The Structure Of Should: English Conservational Usage

S.No.

Use of should

Illustrating examples

1.

Advise or suggestion

You should work out daily to reduce belly fat.


You should wake up early to stay healthy. 

2.

A situation likely happening in the present moment. 

Shweta should have reached home by now. Give her a call.

3.

A prediction of thing that is likely to happen in the future.

You should win the gold medal in the Tokyo Olympics to raise India’s pride.

4.

Should + Have + Past Participle


This formula expresses that the “subject” did not fulfill its responsibility in the past or did not act responsibly.  

You should have participated in the cricket match.


You should have submitted the payroll report to HR when you were asked to do so.

5.

Should + Verb + - ing (Gerund)


The “subject” is not fulfilling its responsibility now or is not acting sensibly as well.

You should be wearing a helmet while driving your two-wheeler.


You should be maintaining your car’s speed limit while driving on highways. 


Now, let us go through the list of examples to understand the uses of should in real life:

List Of Examples Of Should Uses In Real Life

  1. To give polite advise, a recommendation, or a suggestion to someone

Should as an advise or a suggestion is to state something is the right thing to do or the correct thing.

  • Does your wound still hurt? You should get an appointment with your family doctor.

  • I think you should dedicate long hours of preparation to crack an entrance so with a good score.

  • Your skin tone is darkening. You should cover your face when walking under the Sun.

  • You really should go for a walk to reduce your stress level.

  1. Talks about a situation that is likely happening in the present

  • Your wife should have reached home safely by now. Ask for her safety reach.

  • He should have prepared the work report by now. I sent him a new task for the next few weeks.

  1. Expresses or predicting a situation is likely to happen in the future 

  • They should bring a gold medal in this Olympic game because they promised to do so.

  • I posted the appointment letter yesterday, it should reach you by Saturday. 

  • It should be having multiple projects in the pipeline by the end of this year.

  1.  Expresses a compulsion that is not as strong as Must.

Should is used in place of Must to make rules, orders, or instructions that are polite. You may find ‘should’ appearing more frequently on formal notices or on information sheets.

  • On hearing the siren, players should start running on the ground.

  • Passengers should check-in at the airport at least 2 hours before the departure time of the flight.

  • You should never hide your facts from the doctor and the lawyer

  • You should pay all your taxes before the deadline to avoid a rush.

  • You should exercise daily before 8 a.m.

Point To Note:

All of the above example sentences can have must in place of should making the strong advise and less polite.


  1. Something was anticipated to happen in the past but didn't happen Formula: (should + have + past participle)

This statement expresses the notion that the subject did not fulfill its responsibility in the past or did not act sensibly.

  • You should have made up your mind to continue working there when you were asked about it yesterday.

  • I should have dedicated more time to collect the facts on this project.

  1. Did not fulfill an obligation (should + be + verb - ing)

This expresses the idea that the subject is not accomplishing its obligation or is not acting sensibly.

  • You should be wearing your seatbelt while driving on the Yamuna Expressway. (The person isn't wearing it right now)

  • You should be preparing for the Reasoning test before the exam date comes. (You are not preparing right now and you should)

  1. Often should modal verb is replaced by ought to without variations in meaning. We must understand that “ought to” sound more formal, but used less frequently.

  • We ought to pay homage to our freedom fighters. (= we should respect our courageous freedom fighters)

  • We ought to celebrate Diwali with our family. (= We should celebrate Diwali with our family)

  • They ought to stop playing tricks on us. (= They should stop playing tricks on us)

Uses Of Shouldn’t (should + not): Facts And Information

We use shouldn't to advise someone to not do something or some activity, because that activity is wrong to do.

  • You shouldn't throw the peel of an apple on the road.

  • We shouldn't leave the office without informing our boss.

  • He shouldn't practice advanced biking techniques until he is trained.

  • Are you tired? You shouldn't participate in games until your body allows doing so.

  • You shouldn't walk the talk until you have implemented the same in your life.


So, we understand that should is a polite advise/recommendation/suggestion, while the verb must is strong advise with less politeness. However, “ought to” is also used in place of should without any alteration in the meaning. 


FAQs on Structure of "Should" in English Grammar

1. What is the basic grammatical structure for using the modal verb 'should' in a sentence?

The fundamental structure for using 'should' in an affirmative sentence is straightforward. It is always followed by the base form of the main verb (V1), regardless of the subject. The formula is: Subject + should + Base Verb (V1) + Object. For example, in the sentence, "You should finish your homework," 'You' is the subject, 'should' is the modal verb, and 'finish' is the base form of the verb.

2. How are negative and interrogative (question) sentences formed with 'should'?

To form negative and interrogative sentences with 'should', you can follow these structures:

  • Negative Structure: To make a sentence negative, add 'not' after 'should'. The common contraction is 'shouldn't'. The structure is: Subject + should not (shouldn't) + Base Verb (V1). For example: "He shouldn't play in the rain."

  • Interrogative Structure: To ask a question, invert the subject and 'should'. The structure is: Should + Subject + Base Verb (V1)? For example: "Should we start the meeting now?"

3. What is the function of the structure 'should have + past participle' in English?

The structure 'should have + past participle (V3)' is used to talk about things that were advisable to do in the past but were not done. It often expresses regret or criticism about a past action or inaction. For instance, the sentence, "I should have taken an umbrella," implies that I didn't take an umbrella and I regret it because it started raining.

4. What is the difference between using 'should' and 'would' in English grammar?

While both are modal verbs, 'should' and 'would' serve different purposes. 'Should' is primarily used for giving advice, stating an obligation, or expressing an expectation (e.g., "You should see a doctor."). In contrast, 'would' is typically used for polite requests (e.g., "Would you pass the salt?"), expressing a desire (e.g., "I would like some tea."), or discussing hypothetical situations (e.g., "If I had the money, I would buy a car.").

5. What does the structure 'should be + past participle (V3)' mean and when is it used?

This structure forms the passive voice with the modal verb 'should'. It is used when the subject of the sentence receives the action, rather than performing it. It indicates what is supposed to happen to the subject. The structure is: Subject + should be + Past Participle (V3). For example, in "The rules should be followed by everyone," the focus is on the rules and the action that must be performed on them.

6. Does the modal verb 'should' have different verb forms like V1, V2, and V3?

No, this is a common misconception. As a modal auxiliary verb, 'should' is invariable. It does not have different forms like a regular verb (e.g., go, went, gone). There is only one form: should. It remains the same regardless of the subject (e.g., I should, he should, they should) and is always followed by the base form of the main verb.

7. How does the meaning of 'should' differ from 'ought to' when giving advice?

'Should' and 'ought to' are very similar and often interchangeable for giving advice. However, there is a subtle difference in nuance. 'Should' is the most common way to give advice or an opinion. 'Ought to' often implies a stronger sense of moral duty or formal obligation. For example, "You should apologise" is general advice, while "You ought to apologise" suggests it is the morally correct thing to do.

8. Besides giving advice, can 'should' be used to express expectation or probability?

Yes, 'should' is frequently used to express that something is expected to happen or is likely to be true based on existing knowledge. In this context, it is a synonym for 'be supposed to'. For example, if you say, "The train should arrive in five minutes," you are not advising the train but expressing a strong expectation based on its schedule.